The article presents the results of ornithological studies carried out on the Ulagan plateau (Eastern Altai) due to increasing anthropogenic influence. This paper presents a species overview and features of the nesting biology of some species of the Anatidae Family. Considerable attention is paid to the features of spring arrivals, the course of nesting processes, spring and autumn migrations. The paper analyzes data on egg laying and nesting dates. This process includes such periods as: the beginning of oviposition, the period of mass oviposition and the latest ovipositions, the dates of the meetings of downy jackets, flaps, the dates of flights and the beginning of accumulations in preparation for long-distance migration are described. In the territory of the Altai Republic, this problem has been little studied and requires further research.

No abstract

Tourism development directly affects territorial biological diversity. Therefore, the main objective of this study is to analyze the biological diversity in the areas with intensive impact of tourism and recreational activities in the Altai Republic. The article presents the results of field studies in the Katun Nature Reserve in the Altai Republic. This territory is characterized by an excessive tourism and recreational burden on ecosystems. Based on the quantitative analysis, data on the abundance (density) of species of clavaceous lepidoptera (diurnal butterflies) and orthopterans, amphibians, reptiles, birds, small mammals, resources of superterraneous biomass of herbage cover and earthworms (lumbricidae) were obtained. The proposed publication is an attempt of a comprehensive analysis of changes occurring in biological communities as a result of the impact of tourism and recreational environmental management.

In modern conditions of Gorny Altai, with an increase in anthropogenic load on the ecosystems of the region, it becomes important to assess environmental pollution. The state of the environment monitoring is a topical direction of science. The work analyzes the distribution and structural features of macrozoobenthos communities in the rivers of Altai. Revealed 25 species of invertebrate aquatic organisms belonging to 4 types and 6 classes. Benthic communities of 12 different water bodies of the Northern and Central Altai have been analyzed. Analysis of the studied structure of groups based on Euclidean distances for the shares of species in communities showed that they can be divided into three classes depending on the dominant species in them. The scheme based on the Jaccard index made it possible to reveal the influence of environmental factors that determine the structure of macrozoobenthos communities in Altai rivers. It was revealed that the anthropogenic factor has an indirect effect on the structure of communities of aquatic organisms; therefore, the macrofauna of aquatic organisms can be used as a primary indicator of the state of aquatic ecosystems.